Calculate the moles of ammonia present in a 1.284 g sample if the molar mass of ammonia is 17.030 g/mol.

The moles of ammonia present in a 1.284 g sample are 0.075.

Explanation:

Molar mass is the mass of one mole of a substance, which can be an element or a compound. If the molar mass of ammonia is 17,030 g / mol, then in 1 mole of ammonia there are 17,030 g.

So, in this case, the following rule of three can be applied: if by definition of molar mass in there are 17.030 g in 1 mole of ammonia, 1.284 g of ammonia in how many moles will it be?

moles=0.075

The moles of ammonia present in a 1.284 g sample are 0.075.